— What's the matter with you, Lucy?— After the long walk, my legs _____ and I couldn't go any farther.
—Are you going to find a job or go on with your study to get a doctor’s degree? —I have had enough of ______ life. I want to find a job.
The young lady responded to my greeting with a ______ look as if I were air, which made me feel somewhat embarrassed.
The stronger the______ for acquiring language skills is, the more quickly a language beginner will learn.
The author used to be a doctor but later gave up the ______ of medicine for full-time writing.
—Can I help you with your heavy box. — ____________.